Cap piercer



FIG. 1 is a top view of a cap piercer in accordance with our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view thereof, the back, left side, and right side views being identical thereto;

FIG. 4 is a top perspective view thereof;

FIG. 5 is a bottom perspective view thereof;

FIG. 6 is a front perspective view thereof; and,

FIG. 7 is another front perspective view thereof, shown at a reduced scale. 

The ornamental design for a cap piercer, as shown and described. 